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Bacteriophage

Pearson Ch. 19 - Viruses

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Biology
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Virology
Virus
Bacteriophage
Lytic cycle
RNA virus
Provirus
Lysogenic cycle
DNA virus
Prophage
Viral evolution
Viral envelope
Retrovirus

Ch 19: Viruses Overview: A Borrowed Life Viruses called bacteriophages can infect and set in motion a genetic takeover of bacteria, such as Escherichia coli Viruses lead ?a kind of borrowed life? between life-forms and chemicals The origins of molecular biology lie in early studies of viruses that infect bacteria Concept 19.1: A virus consists of a nucleic acid surrounded by a protein coat The Discovery of Viruses: Scientific Inquiry Tobacco mosaic disease stunts growth of tobacco plants and gives their leaves a mosaic coloration In the late 1800s, researchers hypothesized that a particle smaller than bacteria caused the disease In 1935, Wendell Stanley confirmed this hypothesis by crystallizing the infectious particle,now known as tobacco mosaic virus (TMV)

Viruses, Prokaryotes, Protists, and Fungus Study Guide

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Biology
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microbiology
Biology
Microorganism
Virus
bacteria
Pathogen
Ascomycota
Eukaryote
cell
Protist
Fungus
Bacteriophage
health

Viruses, Prokaryotes, Protists, and Fungus Study Guide Discovery of Viruses : ? While studying the tobacco mosaic disease that affects tobacco plants, scientist Dmitri Ivanovsky passed extracts of diseased tobacco leaves through filter pores small enough to strain out bacteria ( which was thought of as being pathogens) ? After realizing that the strained substance (thought to be disease free) could STILL pass on the disease, it lead him to believe that the pathogen was NOT bacteria?but what was it? Structure of Viruses : ? Basic viral structure includes genetic material (either DNA or RNA ? not both) surrounded by a protein called capsid. ? In some viruses, the capsid is surrounded by a lipid envelope that surface from which
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